<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="../../vue.js"></script>
</head>
<body>
  <div id="app">
    <h1>{{msg}}</h1>
  </div>
  
  <script>
    Vue.config.productionTip=false;
    const vm=new Vue({
      
      data:{
        msg:"彭建敏加油,你一定是最好的"
      }
    })

    // 把vm的挂载单独写出来,可以自己选择挂载的时机
    setTimeout(() => {
      vm.$mount("#app")
    }, 2000);
  </script>
</body>
</html>